Sonny Liston was a legendary heavyweight boxer who made history with his impressive skills in the ring. When it comes to synonyms for "Sonny Liston," some possible options could include "champion," "boxer," "fighting legend," or "boxing icon." Some people might also describe Liston as a "pugilist," "fighter," or "brawler." Regardless of the term used, it's clear that Sonny Liston will always be remembered as one of the greatest boxers of all time, and his legacy will continue to inspire and motivate aspiring fighters for years to come.